CSS フォーマッター オンライン無料版

Free 無料 · ログイン不要 · データ保存なし
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CSS INPUT
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// formatted CSS output

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なぜこれが最高のオンラインCSSフォーマッターなのか

スマートフォーマット

Correctly handles all CSS constructs: selectors, rule blocks, at-rules (@media, @keyframes, @supports), comments, and nested rules with proper indentation.

シンタックスハイライト

Output is colour-coded: selectors, property names, values, at-rules, comments, CSS custom properties, and colour literals are all visually distinct, making the formatted code easy to scan.

ミニファイ

The Minify button strips all whitespace, comments, and unnecessary semicolons from your CSS — ideal for checking what a bundler will produce, or for quickly minifying small snippets.

プライバシー最優先

All CSS formatting happens entirely in your browser. Nothing is sent to any server. Your code stays private and the tool works offline.

よくある質問

What is a CSS formatter?

A CSS formatter takes raw or minified CSS and reformats it with consistent indentation, spacing, and line breaks for readability. It does not change how styles are applied — only their visual structure for developers.

Does formatting CSS change how it works in browsers?

No. Browsers parse CSS the same way whether it is minified or beautifully indented. Only the developer experience changes. Formatted CSS is far easier to read, debug, and maintain.

Are CSS custom properties (variables) supported?

Yes. CSS custom properties like --primary-color: #00e5b8 are handled correctly and highlighted with a distinct colour in the output.

Does it handle @media, @keyframes, and other at-rules?

Yes. All at-rules including @media, @keyframes, @supports, @import, and @font-face are supported. Nested rules are indented an extra level automatically.

What is CSS minification?

CSS minification removes all unnecessary whitespace and comments to reduce file size, improving page load speed. This tool's Minify button lets you preview the minified output before deploying.

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